% Single-file document using biblatex
\documentclass{article}

\usepackage[backend=biber,style=authoryear]{biblatex}

\addbibresource{bibliography.bib}
\addbibresource{supplements.bib}

\begin{document}

\title{BibLaTeX Single File}
\author{Test Author}
\maketitle

\section{Introduction}

This uses biblatex \cite{kitchin-2015-examp}.

\printbibliography

\end{document}
